"I've done some research," Luna said. "And it appears that to destroy a Horcrux you have to use something magically powerful, such as something deadly from a magical animal or a very powerful curse, or you make the master of the Horcrux feel remorseful about the murder that they used to split their soul."
"Well, we know that won't work," Neville muttered.
"There are some exceptions, such as unicorn blood, which is so pure that it evaporates the darkness right away," Luna continued. "However, to use the blood, you would have to slay a unicorn, which would condemn you to a half-life and an extremely undesirable afterlife."
"Would Avada Kedavra work, Luna?" Harry asked.
"Well, yes," she said, surprised. "I suppose it would."
Draco looked at Harry and narrowed his eyes. If Harry was planning what Draco thought he was planning. . .
"What about Basilisk venom?" Neville asked, interrupting his thoughts.
"Yes, I believe so," Luna answered.
"There's some in the Chamber of Secrets," Neville explained. "Harry told me about slaying the Basilisk down there."
"But won't it be dried up or something?" Harry asked.
"No," Draco said and all eyes turned on him. "Think about it. Wizard's live well into their hundreds. So a magical creature should live even longer, and that would extend into the preservation of its body. How do you think Ollivander gets dragon heart strings for wands?"
"So if we can get down there," Harry started.
"We can get the venom," Neville finished.
No more needed to be said. They left out of the Room of Requirement and snuck down to Severus's office.
"There's Basilisk venom in this school and nobody saw fit to inform me? Do you know how many Potions require Basilisk venom?" was his initial reaction.
"I apologize, Professor," Harry said with a cheeky grin. "I suppose that I didn't tell you on account of not knowing that it wasn't just dust now."
"We will go down there. You will get what you need, I will get what I need, and we will leave," Sev said.
They went down into the Chamber, Draco blushing every time Harry hissed 'open', and eventually came in contact with the Basilisk. It smelled like rotting fish and sewage down there. Though, Harry supposed, that it would smell like that, as the snake king had been using the sewage pipes to get around the school.
"This is beautiful," Severus breathed.
"Absolutely marvelous," Draco agreed.
"Are you two done fanboying about the dead snake, now? We have work to do, ya know." Neville said cheekily.
"Oh, Neville," Luna said. "Let them have their fun."
They eventually left, Severus listing all the potions he could concoct now, and went to the potions lab.
"We need to get these to the Manor," Draco said. "We can't keep them in our dormitories."
"You can use my Floo. Just make sure to be in and out in an unsuspicious amount of time," Severus said.
"Harry and Draco can go," said Luna. "I suspect they have a lot to talk about. Come along Neville," she said and walked out, Neville following close behind.
"Be safe," Severus said and walked out.
They went through the Floo easily enough - easily being that Harry didn't end up in Knockturn Alley - and brushed the soot off of their clothes. They dropped the fangs off in the potions lab and Draco shoved Harry into the wall.
"Ow, Draco, what the hell?!" Harry exclaimed.
"Why the bloody hell did you ask about Avada Kedavra?" Draco asked venomously.
"No reason," Harry said and tried to push past him, but Draco wasn't having it.
"So you just asked for no reason? Not because you just found out you're a Horcrux and now your bloody saviour complex is convincing you that you have to die?" He said, side-stepping and blocking Harry's path.
"Draco, don't start with this-" Harry started to say, but Draco interrupted him.
"I WILL START WITH WHATEVER I DAMN WELL PLEASE!" Draco shouted hysterically. "You want me to just let you die?! To let you sacrifice yourself?! I can't! I won't!"
"Well that's not your decision, is it?" Harry asked quietly. "In the end it's my life."
"And you're gonna let it end?! Just like that?! With the flick of a wand?!" Draco cried desperately.
"If that's what it takes to save the Wizarding World-" Harry started, but was interrupted once again.
"TO HELL WITH THE WIZARDING WORLD!" Draco yelled. "I'M TALKING ABOUT YOU! YOU CAN'T DIE! I LOVE YOU!"
"Well that's just selfish, isn't it?" Harry near whispered, and it was a miracle that Draco had even heard it. "Don't you get it? I can't afford to put my own needs above this war! You're not in the center of this! You don't understand what it's like to have to put a world of people's needs above your own! One life is nothing compared to losing everybody and everything that the Wizarding World has built up!"
"But, Harry," Draco sobbed. Harry pulled him into a hug and they stayed there for a few seconds, Harry whispering reassurances into Draco's ears.
"I know, I know," Harry said. "But there's nothing we can do. Hey, Dray?"
"Hmm?" he responded into Harry's shoulder.
"I love you," Harry said. Draco lifted his head and looked Harry directly in the eyes.
"I love you too."